Method of coating paper and articles produced thereby.



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No Drawing.

To all whom it may canoe rm Be it known that'I, HANS GnsELL, a citivzen of the United States, residing in Montclair,'county of Essex, and State of New- Jersey, have invented certain new and'useful Improvements fication.

The invention relates to the coating of paper and similar material.

According to my invention paper, preferably when in the form ofa web or strip,

is provided with a coating that comprises a condensation product madefrom phenolor its equivalent, and formaldehyde or its equivalent or in other words, a homogeneous infusible resinous product derived from a fusible condensation product of an organic compound containing alcoholic hydroxyl on s. e e It is well known that phenol or any one or more of its equivalentsreacts'with formalde hyde or any one or more of its equivalents to form a hard fusible product-which is frequently referred to as a hard fusible phenol resin.

Accordingto one phase ofmy invention said resinousproduct, be it a phenol resin or some other fusible resin, is dissolved in any oneof, or a mixture of, the followingsolvents; for example, ether, ethlybromid, alcohol, wood alcohol, acetic ether, amylacetate,

resin.

Paper having a coating of such'an ultimate infusible and insoluble condensation product has a comparatively hard surface, is rendered transparent by the treatment, and also has suflicient 1 flexibility,-which 'flexibilty, however, is more or less dependent upon the thickness'of the paper to which the coating is applied as Well as upon the thickness of the coating which is thus applied. The coating thus described,as ind1cated by' its name, is not softened b heat and since it is not soluble it is not a ected' by moisture or liquids. The paper thus coated has certain requisite characteristics'which enable it to Specification of Letters I atent.

Relating to the Methods of Coating Paper and Articles Produced Thereby, of Whlch the following is a speci--.

ra aaase t'. 3, 1.9.18.

Application filed February 15,1915. Serial m.- 8,243.

be used in many, p1aces; 'for'example, as a substitute for thin sheets of celluloid and also in many places where the common waxed paper is used to-day.

. In many instances it has been desired to provide a waxed paper that would be provided with a coating which would have a melting point higher than that of the coating of the waxed papers which have been produced up to the present time. By having the resulting coating comprise a mixture, so to speak, of waxor'its equivalent and the-ultimate infusible and insoluble condensation product above describedthat is, with the condensation product of phenol or its equivalent and formaldehyde or its equivalent-Waxed paper can be produced which will have the desired degree of flexibility or stifiness, and'have a higher melting oint..

A met 0d of producing such a waxed paper comprises the placing of wax. or waxes,

such as any of the mineral waxes, paraifin or ceresin, for example, and a fusible resin, as a phenol resin, in a common solvent be such solvent easily volatileor non-volatileand applying the resulting solution to the paper .to'be coated. Some 'of the solvents WhlOh may be used for this purpose are the follow ing: ether, ethylbromid, aleohol,wood alcohol, acetic ether, amylacetate, benzol, chloroform, acetone, petroleum ether, nitrobenzol,

paratoluidin, phenol, pyridin, carbon-bisulfid,

carbon-tetrachlorid, toluol, xylol. Whether or not anyone or more of the abovesolvents may be utilized as a common solvent manifestly depends upon .theparticula'r wax or waxes used and also upon the particular resin which is used.

After the paper is thus coated it is dried in any suitable manner and heat may be used, 1f found necessary, to assist in changing the resin into an ultimate infusible and insoluble product, as desired. When the paper is coated in this manner an ultimate infusible and insoluble product (or products) will be formed thereupon. There will be mixed with the ultimate infusible and insoluble product (or products), thewax or waxes 'whichwere origlnally dissolved in the j common solvent. The ultimate product and the Wax or waxes thus mixed provide the. coating of the paper.; As above indicated, the resulting aper will have a'melting point relatively h1g er than the ordinary waxed paper, but it should be noted'that the result- 15. than those above described, may be inserted ing paper will also have a flexibility which is relatively greater than the paper which is I comprises the mlxed together wax and ultimate infusible and insoluble condensation product above referred to, has a comcoated merely with, the ultimate infusible.

and insoluble condensation product, such as this specification. i

' Thev resulting paper, the coating of which resulted from the method first described in paratively high degree of transparency, re-

sists a' comparatively high degree of heat .and is not affected by moisture,'nor to any material degree by ordinary liquids.

It will be manifest that ingredients, other in the liquid prior to providing the paper with coating, or that ingredients might be appliedto the paper'while the coating thereon is in a soft condition.

I believe, however,-that I am the first to 7 apply a resinous'condensation product as from phenol orits equivalent and from formaldehyde or its equivalent as a coating to paper, or as an essentialcomponent in the coating applied to paper, and consider that my claims should be broadly construed. It

I is manifest that the invention herein described may be realized in many different ways and appliedlto many difierent-paper products without departing from the spirit and scope-of the invention, and that the invention may be applied to the coating of I paper be it in sheet, strip, web or anyother similar form, cloth, and webs of other ..p'roducts.

It .willalsobe'manifest that any coloring material can be added-to the solution'before it is applied to'the paper-lor. other article for the .purpose of coating the same, and there maybe added to the solution any inert materials which it is desired to have in the 1 ultimate resinous condensation holic hydroxyl .grou s.

, fusible resin that is a condensation product,

2. The method 0 treating paper which method comprises the dissolving, in asuitable solvent, of a wax such as parafiin and a applying a coating of the resulting solution to paper and'dryingat a suflicient temperature the paper untll the coating thereupon comprises an infusible and insoluble condensation product mixed with the wax.

3.-' An article of manufacture which is produced by the dissolving, in a suitable solvent, of a wax such as paraflin' a'nda fusible condensation product, applying a coating of mamas the resulting solution to paper and heating the paper until the condensation product I thereupon has been changed into an ultimate infusible and insoluble condensation product.

I 4. A paper having a coating thereupon comprismg a wax such as paraflin and a resinous condensation product or its equivalent.

5. A method which comprises the dissolv- I ing of a resinous condensation product and a wax, such as paraflin, in a suitable solvent, coating a paper or the like with theresulting solution and drying the paper thus coated, as with the application of heat, leaving the paper, provided with a coating comprising wax and a resinous condensation product, the wax and thecondensation product being mixed together in the coating.

' 6. A method which comprises the dissolv- "ing of a resinous condensation product and a mineral wax in a suitable solvent, also mixing therewith an inert material, such as color, subsequently applying the resulting solution or mixture to an article, then heating so as to leave upon the article a coating comprising an ultimate infiusible and insoluble condensation product.

- by the application of heat, sufiicient in temperature to leave upon the article a coating comprising an ultimate infusible and insoluble condensation product 8. A method which comprises the dissolving of a resinous condensation product and a Wax, such as paraffin, in a sultable solvent, coating a paper or the like with the result- .ing solution and heating the paper thus coated in a manner so that there will be left upon the paper a coating that comprises wax and an ultimate. infusible andinsoluble resinous condensation product, the wax and said ultimate condensation product being mixed together in the coatin '9. A method whic 1 comprises the dissolving of a resinous condensatlon product and a mineral wax in a suitable solvent, subsequently applying the resulting solution or mixture to an article and heating in a manner to leave upon the article a coating comprising an ultimate infusible and insoluble condensation product.

10. A method which comprises the, dissolving of a resinous condensation. product and a wax, such as paraffin, in a suitable solvent, applying the mixture of solution to an article and subsequently dryi gby'the applicationof heat which is'sufi'icient in temperature to leave upon the article a coatin which comprises an.;ult1mate infusible an insoluble condensation product. a

11; A paper having a'transparent coating and heating until there is left upon the thereupon which transparent coating compaper a coating which comprises an infu prises paraffin or other mineral wax having sible and insoluble resinouscondensation mixed therewith an ultimate infusible and product. a 5 insoluble condensation product derived from v This specification signed and witnessed a resinous fusible condensation product. this llth'day of February, A. D. 1915.

12. Inthe making of a paper transparent HANS GESELL. the method which comprises dissolving a Signed in the presence offusible phenol resin in a suitable solvent, EDWIN A. PACKARD,

10 coating the paper witha resulting solution KEATING. 

